Pumpokol (Pumpokol: gebeŋ-aj) is one of the Yeniseian languages, formerly spoken by the Pumpokol people (Gebéŋ). It has been extinct since the 18th century. It shares many features with the ancient Xiongnu and Jie languages, and according to Alexander Vovin, Edward Vajda, and Étienne de la Vaissière, is closely related to them. It is poorly attested, and some of the vocabulary has been identified as being Yugh, not Pumpokol.
The Yeniseian people refers either to the modern or ancient Siberian populations speaking Yeniseian languages. Despite evidence pointing to the historical presence of Yeniseian populations throughout Central Siberia and Northern Mongolia, only the Ket and Yugh people survive today. The modern Yeniseians live along the eastern middle stretch of the Yenisei River in Northern Siberia. According to the 2021 census, there were 1,088 Kets and 7 Yugs in Russia.
Based on hydronymic data, the Yeniseians originated from the area around the Sayan Mountains and the southern tip of Lake Baikal. The known historical distribution of the Yeniseians is likely to represent a northward migration, with the modern-day Kets representing the very northernmost expansion of the language family. This migration possibly occurred as a result of the fall of the Xiongnu confederation, which, according to Alexander Vovin, is likely to have had a Yeniseian-speaking component among its ruling elite. The Jie people, a branch of the Xiongnu who established the Later Zhao state in China, are likely to have spoken a variant of Yeniseian close to Pumpokol.